As police wrap up at least the crime-scene portion of their investigation into Lanza's murderous spree that left 26 people dead in the school, including 20 first-graders, the earplugs are not the only evidence that shows Lanza might have carried habits either from the shooting range or the virtual world of video games into his real-world massacre.

Lanza changed magazines frequently as he fired his way through the first-grade classrooms of Lauren Rousseau and Victoria Soto, sometimes shooting as few as 15 shots from a 30-round magazine, sources said. . . .